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#include "opencv2/opencv.hpp"#include 
   
    #pragma warning(disable : 4996) using namespace std;using namespace cv;int value;void onChange(int, void *param) {
   	VideoCapture cap = *(VideoCapture*)param;//用于实现拖动Trackbar时改变视频的帧位置	cap.set(CAP_PROP_POS_FRAMES, value);  //设置视频帧位置}void main() {
   	VideoCapture cap("E:\\OpenCV\\videos\\fqy.mp4");	Mat img;	int FramePos;	double fps = cap.get(CAP_PROP_FPS);//获取视频帧率	int FpsCount = cap.get(CAP_PROP_FRAME_COUNT);//获取视频总帧数	char FrameFps[20];	sprintf(FrameFps, "FPS:%0.1f", fps);	namedWindow("Frame", WINDOW_AUTOSIZE);	createTrackbar("Video", "Frame", &value, FpsCount,onChange, &cap);	while (1) {
   		cap >> img;		if (img.empty()) {
   			return;		}		FramePos = cap.get(CAP_PROP_POS_FRAMES);//获取视频帧位置		setTrackbarPos("Video", "Frame", FramePos);//用于实现Trackbar随视频播放而平均移动		putText(img, FrameFps, Point(10, 50), FONT_HERSHEY_PLAIN,2, Scalar(255, 0, 0), 1, 8);		imshow("Frame", img);		if (waitKey(1000/ fps)== 13) {
   			break;		};	}}
   

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